Malfunction Table - Bosch Rexroth 11 Series Instruction Manual

Table 15: Axial piston unit malfunction table
Malfunction
Unusual noises
Increased, unusual vibration

14.2 Malfunction table

Possible cause
Insufficient air bleeding of the hydraulic system
Insufficient suction conditions, e.g. insufficient
dimensioning of the suction line, viscosity
of the hydraulic fluid too high, suction height
too high, suction pressure too low, foreign
particles in the suction line, impermissible filter
in the suction line
Drive speed too high
Wrong direction of rotation
Improper mounting of the axial piston unit
Improper mounting of assembled parts,
hydraulic lines or improper installation
of the coupling
Valve and controller vibrate
Mechanical damage to the axial piston unit
(e.g. bearing damage)
Bearings worn
Remedy
Fill the axial piston unit, suction line for the
hydraulic pump and the reservoir
Completely air bleed the axial piston unit and
hydraulic system
Check correct installation position
Machine/system manufacturer: Check the
system, e.g. optimize inlet conditions, use
suitable hydraulic fluid
Fill the suction line with hydraulic fluid
Remove foreign particles from the suction line
Machine/system manufacturer: Reduce drive
speed
Machine/system manufacturer:
Check correct direction of rotation,
see chapter 7.4.1 "Preparation" on page 31
Check the mounting of the axial piston unit
according to the specifications of the machine/
system manufacturer – observe tightening
torques
Mount assembled parts according to the
information provided by the coupling fitting
manufacturer
Optimize the adjustment of the controller
of the axial piston unit and the pressure
limitation in the hydraulic system
Replace axial piston unit
Contact Bosch Rexroth Service
Contact Bosch Rexroth Service
RE 92801-01-B/11.2018, A15VSO/A15VLO Series 11, Bosch Rexroth AG
Troubleshooting 53/60